沿坩埚壁的层面略低1~2mm的翻译：Slightly below the level of the Crucible wall 1~2mm 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Slightly lower along the crucible wall level of 1 ~ 2mm

Slightly below the level of the Crucible wall 1~2mm

Along crucible wall stratification plane slightly low 1~2mm

Crucibles along the wall slightly lower level 1 ~ 2mm

Slightly below the level of the Crucible wall 1~2mm